| /* |
| * This file is part of the Chelsio T3 Ethernet driver for Linux. |
| * |
| * Copyright (C) 2003-2009 Chelsio Communications. All rights reserved. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this |
| * release for licensing terms and conditions. |
| */ |
| |
| #include <linux/list.h> |
| #include <linux/notifier.h> |
| #include <asm/atomic.h> |
| #include <linux/proc_fs.h> |
| #include <linux/if_vlan.h> |
| #include <linux/highmem.h> |
| #include <linux/vmalloc.h> |
| #include <linux/netdevice.h> |
| #include <net/neighbour.h> |
| |
| #if defined(CONFIG_XEN) && defined(CONFIG_XEN_TOE) |
| #include <net/bridge/br_private.h> |
| #endif |
| |
| #include "common.h" |
| #include "regs.h" |
| #include "cxgb3_ioctl.h" |
| #include "cxgb3_ctl_defs.h" |
| #include "cxgb3_defs.h" |
| #include "l2t.h" |
| #include "firmware_exports.h" |
| #include "cxgb3_offload.h" |
| |
| #include "cxgb3_compat.h" |
| #if defined(NETEVENT) |
| #include <net/netevent.h> |
| #endif |
| |
| |
| #if defined(CONFIG_TCP_OFFLOAD_MODULE) |
| #if defined(BOND_SUPPORT) |
| #include <drivers/net/bonding/bonding.h> |
| #endif |
| #include <linux/toedev.h> |
| #endif |
| |
| static LIST_HEAD(client_list); |
| static LIST_HEAD(ofld_dev_list); |
| static DEFINE_MUTEX(cxgb3_db_lock); |
| |
| /* Track # of adapters registered for offload */ |
| static atomic_t registered_ofld_adapters = ATOMIC_INIT(0); |
| |
| #ifndef RAW_NOTIFIER_HEAD |
| # define RAW_NOTIFIER_HEAD(name) struct notifier_block *name |
| # define raw_notifier_call_chain notifier_call_chain |
| # define raw_notifier_chain_register notifier_chain_register |
| # define raw_notifier_chain_unregister notifier_chain_unregister |
| #endif |
| |
| static RAW_NOTIFIER_HEAD(offload_error_notify_list); |
| static DEFINE_MUTEX(notify_mutex); |
| |
| int register_offload_error_notifier(struct notifier_block *nb) |
| { |
| int err; |
| |
| mutex_lock(¬ify_mutex); |
| err = raw_notifier_chain_register(&offload_error_notify_list, nb); |
| mutex_unlock(¬ify_mutex); |
| return err; |
| } |
| EXPORT_SYMBOL(register_offload_error_notifier); |
| |
| int unregister_offload_error_notifier(struct notifier_block *nb) |
| { |
| int err; |
| |
| mutex_lock(¬ify_mutex); |
| err = raw_notifier_chain_unregister(&offload_error_notify_list, nb); |
| mutex_unlock(¬ify_mutex); |
| return err; |
| } |
| EXPORT_SYMBOL(unregister_offload_error_notifier); |
| |
| #ifdef LINUX_2_4 |
| static unsigned int MAX_ATIDS = 64 * 1024; |
| #else |
| static const unsigned int MAX_ATIDS = 64 * 1024; |
| #endif /* LINUX_2_4 */ |
| static const unsigned int ATID_BASE = 0x10000; |
| |
| static inline int offload_activated(struct t3cdev *tdev) |
| { |
| struct adapter *adapter = tdev2adap(tdev); |
| |
| if (!cxgb3_filter_toe_mode(adapter, CXGB3_FTM_TOE)) { |
| int i; |
| printk(KERN_WARNING "Offload services disabled for adapter %s:" |
| " filters in use; ports:\n", tdev->name); |
| for_each_port(adapter, i) { |
| struct net_device *dev = adapter->port[i]; |
| printk(KERN_WARNING " %d: %s\n", i, dev->name); |
| } |
| return 0; |
| } |
| return (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map)); |
| } |
| |
| int offload_error_notification(struct net_device *netdev, unsigned long error) |
| { |
| struct t3cdev *tdev = dev2t3cdev(netdev); |
| |
| if (offload_activated(tdev)) { |
| mutex_lock(¬ify_mutex); |
| raw_notifier_call_chain(&offload_error_notify_list, error, tdev); |
| mutex_unlock(¬ify_mutex); |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(offload_error_notification); |
| |
| /** |
| * cxgb3_register_client - register an offload client |
| * @client: the client |
| * |
| * Add the client to the client list, |
| * and call backs the client for each activated offload device |
| */ |
| void cxgb3_register_client(struct cxgb3_client *client) |
| { |
| struct t3cdev *tdev; |
| |
| mutex_lock(&cxgb3_db_lock); |
| list_add_tail(&client->client_list, &client_list); |
| |
| if (client->add) { |
| list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) { |
| if (offload_activated(tdev)) |
| client->add(tdev); |
| } |
| } |
| mutex_unlock(&cxgb3_db_lock); |
| } |
| EXPORT_SYMBOL(cxgb3_register_client); |
| |
| /** |
| * cxgb3_unregister_client - unregister an offload client |
| * @client: the client |
| * |
| * Remove the client to the client list, |
| * and call backs the client for each activated offload device. |
| */ |
| void cxgb3_unregister_client(struct cxgb3_client *client) |
| { |
| struct t3cdev *tdev; |
| |
| mutex_lock(&cxgb3_db_lock); |
| list_del(&client->client_list); |
| |
| if (client->remove) { |
| list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) { |
| if (offload_activated(tdev)) |
| client->remove(tdev); |
| } |
| } |
| mutex_unlock(&cxgb3_db_lock); |
| } |
| EXPORT_SYMBOL(cxgb3_unregister_client); |
| |
| /* Get the t3cdev associated with a net_device */ |
| struct t3cdev *dev2t3cdev(struct net_device *dev) |
| { |
| const struct port_info *pi = netdev_priv(dev); |
| |
| return (struct t3cdev *)pi->adapter; |
| } |
| EXPORT_SYMBOL(dev2t3cdev); |
| |
| /** |
| * cxgb3_add_clients - activate register clients for an offload device |
| * @tdev: the offload device |
| * |
| * Call backs all registered clients once a offload device is activated |
| */ |
| void cxgb3_add_clients(struct t3cdev *tdev) |
| { |
| struct cxgb3_client *client; |
| |
| mutex_lock(&cxgb3_db_lock); |
| list_for_each_entry(client, &client_list, client_list) { |
| if (client->add) |
| client->add(tdev); |
| } |
| mutex_unlock(&cxgb3_db_lock); |
| } |
| |
| /** |
| * cxgb3_remove_clients - activate register clients for an offload device |
| * @tdev: the offload device |
| * |
| * Call backs all registered clients once a offload device is deactivated |
| */ |
| void cxgb3_remove_clients(struct t3cdev *tdev) |
| { |
| struct cxgb3_client *client; |
| |
| mutex_lock(&cxgb3_db_lock); |
| list_for_each_entry(client, &client_list, client_list) { |
| if (client->remove) |
| client->remove(tdev); |
| } |
| mutex_unlock(&cxgb3_db_lock); |
| } |
| |
| /** |
| * cxgb3_err_notify - notifies a device failure to the registered clients |
| * @tdev: the offload device |
| * @status: H/W status: up or down |
| * @error: error identifier |
| * |
| * Call backs all registered clients if the ASIC gets reset on a fatal error |
| */ |
| void cxgb3_err_notify(struct t3cdev *tdev, u32 status, u32 error) |
| { |
| struct cxgb3_client *client; |
| |
| mutex_lock(&cxgb3_db_lock); |
| list_for_each_entry(client, &client_list, client_list) { |
| /* |
| * restricted to TOM at this point, |
| * until iSCSI and iWARP catch up |
| */ |
| if (client->name && strcmp(client->name, "tom_cxgb3") == 0 && |
| client->event_handler) |
| client->event_handler(tdev, status, error); |
| } |
| mutex_unlock(&cxgb3_db_lock); |
| } |
| |
| #if defined(CONFIG_XEN) && defined(CONFIG_XEN_TOE) |
| /** |
| * is_vif - return TRUE if a device is a Xen virtual interface (VIF) |
| * @dev: the device to test for VIF status ... |
| * |
| * N.B. Xen virtual interfaces (VIFs) have a few distinguishing |
| * features that we can use to try to determine whether we're |
| * looking at one. Unfortunately there's noting _really_ defined |
| * for them so this is just a hueristic and we probably ought to |
| * think about a better predicate. For right now we look for a |
| * name of "vif*" and a MAC address of fe:ff:ff:ff:ff:ff ... |
| */ |
| static int is_vif(struct net_device *dev) |
| { |
| const char vifname[3] = "vif"; |
| const char vifmac[ETH_ALEN] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff }; |
| |
| return (memcmp(dev->name, vifname, sizeof(vifname)) == 0 && |
| memcmp(dev->dev_addr, vifmac, ETH_ALEN) == 0); |
| } |
| |
| /** |
| * is_xenbrpif - return TRUE if we have the pysical interface (PIF) |
| * for a Xen bridge (XENBR) |
| * |
| * @xenbr: the Xen bridge net device |
| * @pif: the physical interface net device |
| * |
| * Search a Xen bridge's port interface list for the specified |
| * physical interface (PIF). Return TRUE if found, FALSE |
| * otherwise. There should be only a single PIF in a Xen bridge; |
| * if we find more than one we're not looking at a standard Xen |
| * bridge used to proxy for a PIF and we return FALSE. |
| */ |
| static int is_xenbrpif(struct net_device *xenbr, |
| struct net_device *pif) |
| { |
| struct net_bridge *br = netdev_priv(xenbr); |
| struct net_bridge_port *port; |
| |
| list_for_each_entry(port, &br->port_list, list) { |
| struct net_device *portdev = port->dev; |
| if (!is_vif(portdev)) |
| return (portdev == pif); |
| } |
| return 0; |
| } |
| |
| struct net_device *get_xenbrpif(struct net_device *xenbr) { |
| |
| struct net_bridge *br = netdev_priv(xenbr); |
| struct net_device *pif = NULL; |
| struct net_bridge_port *port; |
| |
| list_for_each_entry(port, &br->port_list, list) { |
| struct net_device *portdev = port->dev; |
| if (!is_vif(portdev)) { |
| if (pif) |
| return NULL; |
| pif = portdev; |
| } |
| } |
| return pif; |
| } |
| #endif |
| |
| #if defined(NETEVENT) || defined(OFLD_USE_KPROBES) |
| static struct t3cdev * dev2tdev(struct net_device *root_dev) |
| { |
| #if defined(CONFIG_TCP_OFFLOAD_MODULE) |
| struct adapter *adapter; |
| #if defined(BOND_SUPPORT) |
| struct bonding *bond; |
| #endif |
| int port; |
| |
| if (!root_dev) |
| return NULL; |
| |
| while (root_dev) { |
| if (root_dev->priv_flags & IFF_802_1Q_VLAN) |
| root_dev = vlan_dev_real_dev(root_dev); |
| #if defined(BOND_SUPPORT) |
| else if (root_dev->flags & IFF_MASTER) { |
| bond = (struct bonding *)netdev_priv(root_dev); |
| /* We select the first child since we can only bond |
| * offload devices belonging to the same adapter. |
| */ |
| read_lock(&bond->lock); |
| if (bond->first_slave) |
| root_dev = bond->first_slave->dev; |
| else |
| root_dev = NULL; |
| read_unlock(&bond->lock); |
| } |
| #endif |
| #if defined(CONFIG_XEN) && defined(CONFIG_XEN_TOE) |
| else if (root_dev->priv_flags & IFF_EBRIDGE) |
| root_dev = get_xenbrdpif(root_dev); |
| #endif |
| else |
| break; |
| } |
| |
| read_lock(&adapter_list_lock); |
| list_for_each_entry(adapter, &adapter_list, adapter_list) { |
| if (!is_offload(adapter)) |
| continue; |
| for_each_port(adapter, port) |
| if (root_dev == adapter->port[port]) { |
| read_unlock(&adapter_list_lock); |
| return dev2t3cdev(root_dev); |
| } |
| } |
| read_unlock(&adapter_list_lock); |
| |
| return NULL; |
| #else |
| return NULL; |
| #endif |
| } |
| #endif |
| |
| static struct net_device *get_iff_from_mac(adapter_t *adapter, |
| const unsigned char *mac, |
| unsigned int vlan) |
| { |
| int i; |
| |
| for_each_port(adapter, i) { |
| struct vlan_group *grp; |
| struct net_device *dev = adapter->port[i]; |
| const struct port_info *p = netdev_priv(dev); |
| |
| if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) { |
| if (vlan && vlan != VLAN_VID_MASK) { |
| grp = p->vlan_grp; |
| dev = grp ? vlan_group_get_device(grp, vlan) : |
| NULL; |
| } |
| #if defined(CONFIG_XEN) && defined(CONFIG_XEN_TOE) |
| else if (dev->br_port) |
| dev = dev->br_port->br->dev; |
| #endif |
| else |
| while (dev->master) |
| dev = dev->master; |
| return dev; |
| } |
| } |
| return NULL; |
| } |
| |
| static inline void failover_fixup(adapter_t *adapter, int port) |
| { |
| struct net_device *dev = adapter->port[port]; |
| struct port_info *p = netdev_priv(dev); |
| struct cmac *mac = &p->mac; |
| |
| if (!netif_running(dev)) { |
| /* Failover triggered by the interface ifdown */ |
| t3_write_reg(adapter, A_XGM_TX_CTRL + mac->offset, |
| F_TXEN); |
| t3_read_reg(adapter, A_XGM_TX_CTRL + mac->offset); |
| } else { |
| /* Failover triggered by the interface link down */ |
| t3_write_reg(adapter, A_XGM_RX_CTRL + mac->offset, 0); |
| t3_read_reg(adapter, A_XGM_RX_CTRL + mac->offset); |
| t3_write_reg(adapter, A_XGM_RX_CTRL + mac->offset, |
| F_RXEN); |
| } |
| } |
| |
| static inline int in_bond(int port, struct bond_ports *bond_ports) |
| { |
| int i; |
| |
| for (i = 0; i < bond_ports->nports; i++) |
| if (port == bond_ports->ports[i]) |
| break; |
| |
| return (i < bond_ports->nports); |
| } |
| |
| static int t3_4ports_failover(struct adapter *adapter, int event, |
| struct bond_ports *bond_ports) |
| { |
| int port = bond_ports->port; |
| struct t3cdev *tdev = &adapter->tdev; |
| struct l2t_data *d = L2DATA(tdev); |
| struct l2t_entry *e, *end; |
| int nports = 0, port_idx; |
| |
| /* Reassign L2T entries */ |
| switch (event) { |
| case FAILOVER_PORT_RELEASE: |
| case FAILOVER_PORT_DOWN: |
| read_lock_bh(&d->lock); |
| port_idx = 0; |
| nports = bond_ports->nports; |
| for (e = &d->l2tab[1], end = d->rover; |
| e != end; ++e) { |
| int newport; |
| |
| if (e->smt_idx == port) { |
| newport = bond_ports->ports[port_idx]; |
| spin_lock_bh(&e->lock); |
| e->smt_idx = newport; |
| if (e->state == L2T_STATE_VALID) |
| t3_l2t_update_l2e(tdev, e); |
| spin_unlock_bh(&e->lock); |
| port_idx = port_idx < nports ? |
| port_idx + 1 : 0; |
| } |
| /* |
| * If the port is released, update orig_smt_idx |
| * to failed over port. |
| * There are 2 situations: |
| * 1. Port X is the original port and is released. |
| * {orig_smt_idx, smt_idx} follows these steps. |
| * {X, X} -> {X, Y} -> {Y, Y} |
| * 2. Port Z is released, a failover from port X |
| * had happened previously. |
| * {orig_smt_idx, smt_idx} follows these steps: |
| * {X, Z} -> {Z, Z} |
| */ |
| if (event == FAILOVER_PORT_RELEASE && |
| e->orig_smt_idx == port) { |
| spin_lock_bh(&e->lock); |
| e->orig_smt_idx = e->smt_idx; |
| spin_unlock_bh(&e->lock); |
| } |
| } |
| read_unlock_bh(&d->lock); |
| break; |
| case FAILOVER_PORT_UP: |
| read_lock_bh(&d->lock); |
| for (e = &d->l2tab[1], end = d->rover; |
| e != end; ++e) { |
| if (e->orig_smt_idx == port && |
| in_bond(e->smt_idx, bond_ports)) { |
| spin_lock_bh(&e->lock); |
| e->smt_idx = port; |
| if (e->state == L2T_STATE_VALID) |
| t3_l2t_update_l2e(tdev, e); |
| spin_unlock_bh(&e->lock); |
| } |
| } |
| read_unlock_bh(&d->lock); |
| break; |
| case FAILOVER_ACTIVE_SLAVE: |
| read_lock_bh(&d->lock); |
| for (e = &d->l2tab[1], end = d->rover; |
| e != end; ++e) { |
| if (e->smt_idx != port && |
| in_bond(e->smt_idx, bond_ports)) { |
| spin_lock_bh(&e->lock); |
| e->smt_idx = port; |
| if (e->state == L2T_STATE_VALID) |
| t3_l2t_update_l2e(tdev, e); |
| spin_unlock_bh(&e->lock); |
| } |
| } |
| read_unlock_bh(&d->lock); |
| break; |
| } |
| return 0; |
| } |
| |
| static int cxgb_ulp_iscsi_ctl(adapter_t *adapter, unsigned int req, void *data) |
| { |
| int i; |
| int ret = 0; |
| unsigned int val = 0; |
| struct ulp_iscsi_info *uiip = data; |
| |
| switch (req) { |
| case ULP_ISCSI_GET_PARAMS: |
| uiip->pdev = adapter->pdev; |
| uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT); |
| uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT); |
| uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK); |
| |
| val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ); |
| for (i = 0; i < 4; i++, val >>= 8) |
| uiip->pgsz_factor[i] = val & 0xFF; |
| |
| val = t3_read_reg(adapter, A_TP_PARA_REG7); |
| uiip->max_txsz = |
| uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0, |
| (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1); |
| |
| /* |
| * On tx, the iscsi pdu has to be <= tx page size and has to |
| * fit into the Tx PM FIFO. |
| */ |
| val = min(adapter->params.tp.tx_pg_size, |
| t3_read_reg(adapter, A_PM1_TX_CFG) >> 17); |
| uiip->max_txsz = min(val, uiip->max_txsz); |
| |
| /* set max. pdu size (MaxRxData) to 16224 */ |
| val = t3_read_reg(adapter, A_TP_PARA_REG2); |
| if ((val >> S_MAXRXDATA) != 0x3f60) { |
| val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE); |
| val |= V_MAXRXDATA(0x3f60); |
| printk(KERN_INFO |
| "%s, iscsi set MaxRxData to 16224 (0x%x).\n", |
| adapter->name, val); |
| t3_write_reg(adapter, A_TP_PARA_REG2, val); |
| } |
| |
| /* |
| * on rx, the iscsi pdu has to be < rx page size and the |
| * the max rx data length programmed in TP |
| */ |
| val = min(adapter->params.tp.rx_pg_size, |
| ((t3_read_reg(adapter, A_TP_PARA_REG2)) >> |
| S_MAXRXDATA) & M_MAXRXDATA); |
| uiip->max_rxsz = min(val, uiip->max_rxsz); |
| break; |
| case ULP_ISCSI_SET_PARAMS: |
| t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask); |
| /* program the ddp page sizes */ |
| for (val = 0, i = 0; i < 4; i++) |
| val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i); |
| if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) { |
| printk(KERN_INFO |
| "%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n", |
| adapter->name, val, uiip->pgsz_factor[0], |
| uiip->pgsz_factor[1], uiip->pgsz_factor[2], |
| uiip->pgsz_factor[3]); |
| t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val); |
| } |
| break; |
| default: |
| ret = -EOPNOTSUPP; |
| } |
| return ret; |
| } |
| |
| /* Response queue used for RDMA events. */ |
| #define ASYNC_NOTIF_RSPQ 0 |
| |
| static int cxgb_rdma_ctl(adapter_t *adapter, unsigned int req, void *data) |
| { |
| int ret = 0; |
| |
| switch (req) { |
| case RDMA_GET_PARAMS: { |
| struct rdma_info *req = data; |
| struct pci_dev *pdev = adapter->pdev; |
| |
| req->udbell_physbase = pci_resource_start(pdev, 2); |
| req->udbell_len = pci_resource_len(pdev, 2); |
| req->tpt_base = t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT); |
| req->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT); |
| req->pbl_base = t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT); |
| req->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT); |
| req->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT); |
| req->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT); |
| req->kdb_addr = adapter->regs + A_SG_KDOORBELL; |
| req->pdev = pdev; |
| break; |
| } |
| case RDMA_CQ_OP: { |
| unsigned long flags; |
| struct rdma_cq_op *req = data; |
| |
| /* may be called in any context */ |
| spin_lock_irqsave(&adapter->sge.reg_lock, flags); |
| ret = t3_sge_cqcntxt_op(adapter, req->id, req->op, |
| req->credits); |
| spin_unlock_irqrestore(&adapter->sge.reg_lock, flags); |
| break; |
| } |
| case RDMA_GET_MEM: { |
| struct ch_mem_range *t = data; |
| struct mc7 *mem; |
| |
| if ((t->addr & 7) || (t->len & 7)) |
| return -EINVAL; |
| if (t->mem_id == MEM_CM) |
| mem = &adapter->cm; |
| else if (t->mem_id == MEM_PMRX) |
| mem = &adapter->pmrx; |
| else if (t->mem_id == MEM_PMTX) |
| mem = &adapter->pmtx; |
| else |
| return -EINVAL; |
| |
| ret = t3_mc7_bd_read(mem, t->addr/8, t->len/8, (u64 *)t->buf); |
| if (ret) |
| return ret; |
| break; |
| } |
| case RDMA_CQ_SETUP: { |
| struct rdma_cq_setup *req = data; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&adapter->sge.reg_lock, flags); |
| ret = t3_sge_init_cqcntxt(adapter, req->id, req->base_addr, |
| req->size, ASYNC_NOTIF_RSPQ, |
| req->ovfl_mode, req->credits, |
| req->credit_thres); |
| spin_unlock_irqrestore(&adapter->sge.reg_lock, flags); |
| break; |
| } |
| case RDMA_CQ_DISABLE: { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&adapter->sge.reg_lock, flags); |
| ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data); |
| spin_unlock_irqrestore(&adapter->sge.reg_lock, flags); |
| break; |
| } |
| case RDMA_CTRL_QP_SETUP: { |
| struct rdma_ctrlqp_setup *req = data; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&adapter->sge.reg_lock, flags); |
| ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0, |
| SGE_CNTXT_RDMA, ASYNC_NOTIF_RSPQ, |
| req->base_addr, req->size, |
| FW_RI_TID_START, 1, 0); |
| spin_unlock_irqrestore(&adapter->sge.reg_lock, flags); |
| break; |
| } |
| case RDMA_GET_MIB: { |
| spin_lock(&adapter->stats_lock); |
| t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data); |
| spin_unlock(&adapter->stats_lock); |
| break; |
| } |
| default: |
| ret = -EOPNOTSUPP; |
| } |
| return ret; |
| } |
| |
| static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data) |
| { |
| struct adapter *adapter = tdev2adap(tdev); |
| struct tid_range *tid; |
| struct mtutab *mtup; |
| struct iff_mac *iffmacp; |
| struct ddp_params *ddpp; |
| struct adap_ports *ports; |
| struct port_array *pap; |
| struct ofld_page_info *rx_page_info; |
| struct tp_params *tp = &adapter->params.tp; |
| struct bond_ports *bond_ports; |
| int port; |
| |
| switch (req) { |
| case GET_MAX_OUTSTANDING_WR: |
| *(unsigned int *)data = FW_WR_NUM; |
| break; |
| case GET_WR_LEN: |
| *(unsigned int *)data = WR_FLITS; |
| break; |
| case GET_TX_MAX_CHUNK: |
| *(unsigned int *)data = 1 << 20; /* 1MB */ |
| break; |
| case GET_TID_RANGE: |
| tid = data; |
| tid->num = t3_mc5_size(&adapter->mc5) - |
| adapter->params.mc5.nroutes - |
| adapter->params.mc5.nfilters - |
| adapter->params.mc5.nservers; |
| tid->base = 0; |
| break; |
| case GET_STID_RANGE: |
| tid = data; |
| tid->num = adapter->params.mc5.nservers; |
| tid->base = t3_mc5_size(&adapter->mc5) - tid->num - |
| adapter->params.mc5.nfilters - |
| adapter->params.mc5.nroutes; |
| break; |
| case GET_L2T_CAPACITY: |
| *(unsigned int *)data = 2048; |
| break; |
| case GET_CPUIDX_OF_QSET: { |
| unsigned int qset = *(unsigned int *)data; |
| |
| if (qset >= SGE_QSETS || |
| adapter->rrss_map[qset] >= RSS_TABLE_SIZE) |
| return -EINVAL; |
| *(unsigned int *)data = adapter->rrss_map[qset]; |
| break; |
| } |
| case GET_PORT_SCHED: { |
| struct port_sched *p = data; |
| |
| if (adapter->params.nports > 2) { |
| const struct port_info *pi = netdev_priv(p->dev); |
| p->sched = pi->port_id; |
| } else |
| p->sched = -1; |
| break; |
| } |
| case GET_NUM_QUEUES: |
| *(unsigned int *)data = adapter->sge.nqsets; |
| break; |
| case GET_MTUS: |
| mtup = data; |
| mtup->size = NMTUS; |
| mtup->mtus = adapter->params.mtus; |
| break; |
| case GET_IFF_FROM_MAC: |
| iffmacp = data; |
| iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr, |
| iffmacp->vlan_tag & VLAN_VID_MASK); |
| break; |
| case GET_DDP_PARAMS: |
| ddpp = data; |
| ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT); |
| ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT); |
| ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK); |
| ddpp->pdev = adapter->pdev; |
| break; |
| case GET_PORTS: |
| ports = data; |
| ports->nports = adapter->params.nports; |
| for_each_port(adapter, port) |
| ports->lldevs[port] = adapter->port[port]; |
| break; |
| case GET_PORT_ARRAY: |
| pap = data; |
| pap->nports = adapter->params.nports; |
| pap->lldevs = adapter->port; |
| break; |
| case FAILOVER: |
| port = *(int *)data; |
| t3_port_failover(adapter, port); |
| failover_fixup(adapter, !port); |
| break; |
| case FAILOVER_DONE: |
| port = *(int *)data; |
| t3_failover_done(adapter, port); |
| break; |
| case FAILOVER_CLEAR: |
| t3_failover_clear(adapter); |
| break; |
| case FAILOVER_ACTIVE_SLAVE: |
| case FAILOVER_PORT_DOWN: |
| case FAILOVER_PORT_UP: |
| case FAILOVER_PORT_RELEASE: |
| bond_ports = data; |
| t3_4ports_failover(adapter, req, bond_ports); |
| break; |
| case GET_RX_PAGE_INFO: |
| rx_page_info = data; |
| rx_page_info->page_size = tp->rx_pg_size; |
| rx_page_info->num = tp->rx_num_pgs; |
| break; |
| case GET_ISCSI_IPV4ADDR: { |
| struct iscsi_ipv4addr *p = data; |
| struct port_info *pi = netdev_priv(p->dev); |
| p->ipv4addr = pi->iscsi_ipv4addr; |
| break; |
| } |
| case SET_ISCSI_IPV4ADDR: { |
| struct iscsi_ipv4addr *p = data; |
| struct port_info *pi = netdev_priv(p->dev); |
| pi->iscsi_ipv4addr = p->ipv4addr; |
| break; |
| } |
| case ULP_ISCSI_GET_PARAMS: |
| case ULP_ISCSI_SET_PARAMS: |
| if (!offload_running(adapter)) |
| return -EAGAIN; |
| return cxgb_ulp_iscsi_ctl(adapter, req, data); |
| case RDMA_GET_PARAMS: |
| case RDMA_CQ_OP: |
| case RDMA_CQ_SETUP: |
| case RDMA_CQ_DISABLE: |
| case RDMA_CTRL_QP_SETUP: |
| case RDMA_GET_MEM: |
| case RDMA_GET_MIB: |
| if (!offload_running(adapter)) |
| return -EAGAIN; |
| return cxgb_rdma_ctl(adapter, req, data); |
| case GET_EMBEDDED_INFO: { |
| struct ch_embedded_info *e = data; |
| |
| spin_lock(&adapter->stats_lock); |
| t3_get_fw_version(adapter, &e->fw_vers); |
| t3_get_tp_version(adapter, &e->tp_vers); |
| spin_unlock(&adapter->stats_lock); |
| |
| break; |
| } |
| default: |
| return -EOPNOTSUPP; |
| } |
| return 0; |
| } |
| |
| /* |
| * Dummy handler for Rx offload packets in case we get an offload packet before |
| * proper processing is setup. This complains and drops the packet as it isn't |
| * normal to get offload packets at this stage. |
| */ |
| static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs, |
| int n) |
| { |
| while (n--) |
| kfree_skb(skbs[n]); |
| return 0; |
| } |
| |
| static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh) |
| { |
| } |
| |
| void cxgb3_set_dummy_ops(struct t3cdev *dev) |
| { |
| dev->recv = rx_offload_blackhole; |
| dev->neigh_update = dummy_neigh_update; |
| } |
| |
| /* |
| * Free an active-open TID. |
| */ |
| void *cxgb3_free_atid(struct t3cdev *tdev, int atid) |
| { |
| struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; |
| union active_open_entry *p = atid2entry(t, atid); |
| void *ctx = p->t3c_tid.ctx; |
| |
| spin_lock_bh(&t->atid_lock); |
| p->t3c_tid.ctx = NULL; |
| p->t3c_tid.client = NULL; |
| p->next = t->afree; |
| t->afree = p; |
| t->atids_in_use--; |
| spin_unlock_bh(&t->atid_lock); |
| |
| return ctx; |
| } |
| EXPORT_SYMBOL(cxgb3_free_atid); |
| |
| /* |
| * Free a server TID and return it to the free pool. |
| */ |
| void cxgb3_free_stid(struct t3cdev *tdev, int stid) |
| { |
| struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; |
| union listen_entry *p = stid2entry(t, stid); |
| |
| spin_lock_bh(&t->stid_lock); |
| p->t3c_tid.ctx = NULL; |
| p->t3c_tid.client = NULL; |
| p->next = t->sfree; |
| t->sfree = p; |
| t->stids_in_use--; |
| spin_unlock_bh(&t->stid_lock); |
| } |
| EXPORT_SYMBOL(cxgb3_free_stid); |
| |
| void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client, |
| void *ctx, unsigned int tid) |
| { |
| struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; |
| |
| t->tid_tab[tid].client = client; |
| t->tid_tab[tid].ctx = ctx; |
| atomic_inc(&t->tids_in_use); |
| } |
| EXPORT_SYMBOL(cxgb3_insert_tid); |
| |
| /* |
| * Populate a TID_RELEASE WR. The skb must be already propely sized. |
| */ |
| static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid) |
| { |
| struct cpl_tid_release *req; |
| |
| skb->priority = CPL_PRIORITY_SETUP; |
| req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid)); |
| } |
| |
| DECLARE_TASK_FUNC(t3_process_tid_release_list, task_param) |
| { |
| struct sk_buff *skb; |
| struct t3c_data *td = WORK2T3CDATA(task_param, tid_release_task); |
| struct t3cdev *tdev = td->dev; |
| |
| spin_lock_bh(&td->tid_release_lock); |
| while (td->tid_release_list) { |
| struct t3c_tid_entry *p = td->tid_release_list; |
| |
| td->tid_release_list = (struct t3c_tid_entry *)p->ctx; |
| spin_unlock_bh(&td->tid_release_lock); |
| |
| skb = alloc_skb(sizeof(struct cpl_tid_release), |
| GFP_KERNEL | __GFP_NOFAIL); |
| |
| mk_tid_release(skb, p - td->tid_maps.tid_tab); |
| cxgb3_ofld_send(tdev, skb); |
| p->ctx = NULL; |
| spin_lock_bh(&td->tid_release_lock); |
| } |
| spin_unlock_bh(&td->tid_release_lock); |
| } |
| |
| /* use ctx as a next pointer in the tid release list */ |
| void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid) |
| { |
| struct t3c_data *td = T3C_DATA(tdev); |
| struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid]; |
| |
| spin_lock_bh(&td->tid_release_lock); |
| p->ctx = (void *)td->tid_release_list; |
| p->client = NULL; |
| td->tid_release_list = p; |
| if (!p->ctx) |
| schedule_work(&td->tid_release_task); |
| spin_unlock_bh(&td->tid_release_lock); |
| } |
| EXPORT_SYMBOL(cxgb3_queue_tid_release); |
| |
| /* |
| * Remove a tid from the TID table. A client may defer processing its last |
| * CPL message if it is locked at the time it arrives, and while the message |
| * sits in the client's backlog the TID may be reused for another connection. |
| * To handle this we atomically switch the TID association if it still points |
| * to the original client context. |
| */ |
| void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid) |
| { |
| struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; |
| |
| BUG_ON(tid >= t->ntids); |
| if (tdev->type == T3A) |
| (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL); |
| else { |
| struct sk_buff *skb; |
| |
| skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC); |
| if (likely(skb != NULL)) { |
| mk_tid_release(skb, tid); |
| cxgb3_ofld_send(tdev, skb); |
| t->tid_tab[tid].ctx = NULL; |
| } else |
| cxgb3_queue_tid_release(tdev, tid); |
| } |
| atomic_dec(&t->tids_in_use); |
| } |
| EXPORT_SYMBOL(cxgb3_remove_tid); |
| |
| int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client, |
| void *ctx) |
| { |
| int atid = -1; |
| struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; |
| |
| spin_lock_bh(&t->atid_lock); |
| if (t->afree && |
| t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <= |
| t->ntids) { |
| union active_open_entry *p = t->afree; |
| |
| atid = (p - t->atid_tab) + t->atid_base; |
| t->afree = p->next; |
| p->t3c_tid.ctx = ctx; |
| p->t3c_tid.client = client; |
| t->atids_in_use++; |
| } |
| spin_unlock_bh(&t->atid_lock); |
| return atid; |
| } |
| EXPORT_SYMBOL(cxgb3_alloc_atid); |
| |
| int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client, |
| void *ctx) |
| { |
| int stid = -1; |
| struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; |
| |
| spin_lock_bh(&t->stid_lock); |
| if (t->sfree) { |
| union listen_entry *p = t->sfree; |
| |
| stid = (p - t->stid_tab) + t->stid_base; |
| t->sfree = p->next; |
| p->t3c_tid.ctx = ctx; |
| p->t3c_tid.client = client; |
| t->stids_in_use++; |
| } |
| spin_unlock_bh(&t->stid_lock); |
| return stid; |
| } |
| EXPORT_SYMBOL(cxgb3_alloc_stid); |
| |
| static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| struct cpl_smt_write_rpl *rpl = cplhdr(skb); |
| |
| if (rpl->status != CPL_ERR_NONE) |
| printk(KERN_ERR |
| "Unexpected SMT_WRITE_RPL status %u for entry %u\n", |
| rpl->status, GET_TID(rpl)); |
| |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| struct cpl_l2t_write_rpl *rpl = cplhdr(skb); |
| |
| if (rpl->status != CPL_ERR_NONE) |
| printk(KERN_ERR |
| "Unexpected L2T_WRITE_RPL status %u for entry %u\n", |
| rpl->status, GET_TID(rpl)); |
| |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| struct cpl_rte_write_rpl *rpl = cplhdr(skb); |
| |
| if (rpl->status != CPL_ERR_NONE) |
| printk(KERN_ERR |
| "Unexpected RTE_WRITE_RPL status %u for entry %u\n", |
| rpl->status, GET_TID(rpl)); |
| |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| struct cpl_act_open_rpl *rpl = cplhdr(skb); |
| unsigned int atid = G_TID(ntohl(rpl->atid)); |
| struct t3c_tid_entry *t3c_tid; |
| |
| t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid); |
| if (t3c_tid && t3c_tid->ctx && t3c_tid->client && |
| t3c_tid->client->handlers && |
| t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) { |
| return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb, |
| t3c_tid->ctx); |
| } else { |
| CH_MSG(tdev2adap(dev), DEBUG, OFLD, |
| "%s: received clientless CPL command 0x%x\n", |
| dev->name, CPL_ACT_OPEN_RPL); |
| return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; |
| } |
| } |
| |
| static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| union opcode_tid *p = cplhdr(skb); |
| unsigned int stid = G_TID(ntohl(p->opcode_tid)); |
| struct t3c_tid_entry *t3c_tid; |
| const struct tid_info *t = &(T3C_DATA(dev))->tid_maps; |
| |
| /* |
| * We get these messages also when setting up HW filters. Throw |
| * those away silently. |
| */ |
| if (stid >= t->stid_base + t->nstids) |
| return CPL_RET_BUF_DONE; |
| |
| t3c_tid = lookup_stid(t, stid); |
| if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
| t3c_tid->client->handlers[p->opcode]) { |
| return t3c_tid->client->handlers[p->opcode] (dev, skb, t3c_tid->ctx); |
| } else { |
| CH_MSG(tdev2adap(dev), DEBUG, OFLD, |
| "%s: received clientless CPL command 0x%x\n", |
| dev->name, p->opcode); |
| return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; |
| } |
| } |
| |
| static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| union opcode_tid *p = cplhdr(skb); |
| unsigned int hwtid = G_TID(ntohl(p->opcode_tid)); |
| struct t3c_tid_entry *t3c_tid; |
| |
| t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid); |
| if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
| t3c_tid->client->handlers[p->opcode]) { |
| return t3c_tid->client->handlers[p->opcode] |
| (dev, skb, t3c_tid->ctx); |
| } else { |
| CH_MSG(tdev2adap(dev), DEBUG, OFLD, |
| "%s: received clientless CPL command 0x%x\n", |
| dev->name, p->opcode); |
| return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; |
| } |
| } |
| |
| static int do_cr(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| struct cpl_pass_accept_req *req = cplhdr(skb); |
| unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); |
| struct tid_info *t = &(T3C_DATA(dev))->tid_maps; |
| struct t3c_tid_entry *t3c_tid; |
| unsigned int tid = GET_TID(req); |
| |
| if (unlikely(tid >= t->ntids)) { |
| printk("%s: passive open TID %u too large\n", |
| dev->name, tid); |
| t3_fatal_err(tdev2adap(dev)); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| t3c_tid = lookup_stid(t, stid); |
| if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
| t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) { |
| return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ] |
| (dev, skb, t3c_tid->ctx); |
| } else { |
| CH_MSG(tdev2adap(dev), DEBUG, OFLD, |
| "%s: received clientless CPL command 0x%x\n", |
| dev->name, CPL_PASS_ACCEPT_REQ); |
| return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; |
| } |
| } |
| |
| /* |
| * Returns an sk_buff for a reply CPL message of size len. If the input |
| * sk_buff has no other users it is trimmed and reused, otherwise a new buffer |
| * is allocated. The input skb must be of size at least len. Note that this |
| * operation does not destroy the original skb data even if it decides to reuse |
| * the buffer. |
| */ |
| static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len, |
| int gfp) |
| { |
| if (likely(!skb_cloned(skb))) { |
| BUG_ON(skb->len < len); |
| __skb_trim(skb, len); |
| skb_get(skb); |
| } else { |
| skb = alloc_skb(len, gfp); |
| if (skb) |
| __skb_put(skb, len); |
| } |
| return skb; |
| } |
| |
| static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| union opcode_tid *p = cplhdr(skb); |
| unsigned int hwtid = G_TID(ntohl(p->opcode_tid)); |
| struct t3c_tid_entry *t3c_tid; |
| |
| t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid); |
| if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
| t3c_tid->client->handlers[p->opcode]) { |
| return t3c_tid->client->handlers[p->opcode] |
| (dev, skb, t3c_tid->ctx); |
| } else { |
| struct cpl_abort_req_rss *req = cplhdr(skb); |
| struct cpl_abort_rpl *rpl; |
| struct sk_buff *reply_skb; |
| unsigned int tid = GET_TID(req); |
| u8 cmd = req->status; |
| |
| WARN_ON(dev->type == T3B); |
| |
| if (req->status == CPL_ERR_RTX_NEG_ADVICE || |
| req->status == CPL_ERR_PERSIST_NEG_ADVICE) |
| goto out; |
| |
| reply_skb = cxgb3_get_cpl_reply_skb(skb, |
| sizeof(struct cpl_abort_rpl), |
| GFP_ATOMIC); |
| |
| if (!reply_skb) { |
| printk("do_abort_req_rss: couldn't get skb!\n"); |
| goto out; |
| } |
| reply_skb->priority = CPL_PRIORITY_DATA; |
| rpl = cplhdr(reply_skb); |
| rpl->wr.wr_hi = |
| htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); |
| rpl->wr.wr_lo = htonl(V_WR_TID(tid)); |
| OPCODE_TID(rpl) = |
| htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid)); |
| rpl->cmd = cmd; |
| cxgb3_ofld_send(dev, reply_skb); |
| out: |
| return CPL_RET_BUF_DONE; |
| } |
| } |
| |
| static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| struct cpl_act_establish *req = cplhdr(skb); |
| unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); |
| struct tid_info *t = &(T3C_DATA(dev))->tid_maps; |
| struct t3c_tid_entry *t3c_tid; |
| unsigned int tid = GET_TID(req); |
| |
| if (unlikely(tid >= t->ntids)) { |
| printk("%s: active establish TID %u too large\n", |
| dev->name, tid); |
| t3_fatal_err(tdev2adap(dev)); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| t3c_tid = lookup_atid(t, atid); |
| if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
| t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) { |
| return t3c_tid->client->handlers[CPL_ACT_ESTABLISH] |
| (dev, skb, t3c_tid->ctx); |
| } else { |
| CH_MSG(tdev2adap(dev), DEBUG, OFLD, |
| "%s: received clientless CPL command 0x%x\n", |
| dev->name, CPL_ACT_ESTABLISH); |
| return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; |
| } |
| } |
| |
| static int do_trace(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| struct cpl_trace_pkt *p = cplhdr(skb); |
| struct adapter *adapter = tdev2adap(dev); |
| |
| skb->protocol = htons(0xffff); |
| skb->dev = dev->lldev; |
| if (adapter->params.nports > 2) |
| skb_pull(skb, sizeof(*p) + 8); /* pull CPL + preamble */ |
| else |
| skb_pull(skb, sizeof(*p)); /* pull CPL */ |
| skb_reset_mac_header(skb); |
| netif_receive_skb(skb); |
| return 0; |
| } |
| |
| static int do_term(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| unsigned int hwtid = ntohl(skb->priority) >> 8 & 0xfffff; |
| unsigned int opcode = G_OPCODE(ntohl(skb->csum)); |
| struct t3c_tid_entry *t3c_tid; |
| |
| t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid); |
| if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
| t3c_tid->client->handlers[opcode]) { |
| return t3c_tid->client->handlers[opcode](dev,skb,t3c_tid->ctx); |
| } else { |
| CH_MSG(tdev2adap(dev), DEBUG, OFLD, |
| "%s: received clientless CPL command 0x%x\n", |
| dev->name, opcode); |
| return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; |
| } |
| } |
| |
| #if defined(NETEVENT) |
| static int nb_callback(struct notifier_block *self, unsigned long event, |
| void *ctx) |
| { |
| switch (event) { |
| case (NETEVENT_NEIGH_UPDATE): { |
| cxgb_neigh_update((struct neighbour *)ctx); |
| break; |
| } |
| #ifdef DIVY /* XXX Divy no NETEVENT_ROUTE_UPDATE definition */ |
| case (NETEVENT_ROUTE_UPDATE): |
| break; |
| #endif |
| case (NETEVENT_PMTU_UPDATE): |
| break; |
| case (NETEVENT_REDIRECT): { |
| struct netevent_redirect *nr = ctx; |
| cxgb_redirect(nr->old, nr->new); |
| cxgb_neigh_update(nr->new->neighbour); |
| break; |
| } |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| #elif defined(OFLD_USE_KPROBES) |
| |
| #ifndef AUTOCONF_INCLUDED |
| #include <linux/autoconf.h> |
| #endif |
| #include <linux/kallsyms.h> |
| #include <linux/kprobes.h> |
| #include <net/arp.h> |
| |
| static int (*orig_arp_constructor)(struct neighbour *); |
| |
| static void neigh_suspect(struct neighbour *neigh) |
| { |
| struct hh_cache *hh; |
| |
| neigh->output = neigh->ops->output; |
| |
| for (hh = neigh->hh; hh; hh = hh->hh_next) |
| hh->hh_output = neigh->ops->output; |
| } |
| |
| static void neigh_connect(struct neighbour *neigh) |
| { |
| struct hh_cache *hh; |
| |
| neigh->output = neigh->ops->connected_output; |
| |
| for (hh = neigh->hh; hh; hh = hh->hh_next) |
| hh->hh_output = neigh->ops->hh_output; |
| } |
| |
| static inline int neigh_max_probes(const struct neighbour *n) |
| { |
| const struct neigh_parms *p = n->parms; |
| return (n->nud_state & NUD_PROBE ? |
| p->ucast_probes : |
| p->ucast_probes + p->app_probes + p->mcast_probes); |
| } |
| |
| static void neigh_timer_handler_offload(unsigned long arg) |
| { |
| unsigned long now, next; |
| struct neighbour *neigh = (struct neighbour *)arg; |
| unsigned state; |
| int notify = 0; |
| |
| write_lock(&neigh->lock); |
| |
| state = neigh->nud_state; |
| now = jiffies; |
| next = now + HZ; |
| |
| if (!(state & NUD_IN_TIMER)) { |
| #ifndef CONFIG_SMP |
| printk(KERN_WARNING "neigh: timer & !nud_in_timer\n"); |
| #endif |
| goto out; |
| } |
| |
| if (state & NUD_REACHABLE) { |
| if (time_before_eq(now, |
| neigh->confirmed + |
| neigh->parms->reachable_time)) { |
| next = neigh->confirmed + neigh->parms->reachable_time; |
| } else if (time_before_eq(now, |
| neigh->used + |
| neigh->parms->delay_probe_time)) { |
| neigh->nud_state = NUD_DELAY; |
| neigh->updated = jiffies; |
| neigh_suspect(neigh); |
| next = now + neigh->parms->delay_probe_time; |
| } else { |
| neigh->nud_state = NUD_STALE; |
| neigh->updated = jiffies; |
| neigh_suspect(neigh); |
| cxgb_neigh_update(neigh); |
| } |
| } else if (state & NUD_DELAY) { |
| if (time_before_eq(now, |
| neigh->confirmed + |
| neigh->parms->delay_probe_time)) { |
| neigh->nud_state = NUD_REACHABLE; |
| neigh->updated = jiffies; |
| neigh_connect(neigh); |
| cxgb_neigh_update(neigh); |
| next = neigh->confirmed + neigh->parms->reachable_time; |
| } else { |
| neigh->nud_state = NUD_PROBE; |
| neigh->updated = jiffies; |
| atomic_set(&neigh->probes, 0); |
| next = now + neigh->parms->retrans_time; |
| } |
| } else { |
| /* NUD_PROBE|NUD_INCOMPLETE */ |
| next = now + neigh->parms->retrans_time; |
| } |
| |
| if ((neigh->nud_state & (NUD_INCOMPLETE | NUD_PROBE)) && |
| atomic_read(&neigh->probes) >= neigh_max_probes(neigh)) { |
| struct sk_buff *skb; |
| |
| neigh->nud_state = NUD_FAILED; |
| neigh->updated = jiffies; |
| notify = 1; |
| cxgb_neigh_update(neigh); |
| NEIGH_CACHE_STAT_INC(neigh->tbl, res_failed); |
| |
| /* It is very thin place. report_unreachable is very |
| complicated routine. Particularly, it can hit the same |
| neighbour entry! |
| So that, we try to be accurate and avoid dead loop. --ANK |
| */ |
| while (neigh->nud_state == NUD_FAILED && |
| (skb = __skb_dequeue(&neigh->arp_queue)) != NULL) { |
| write_unlock(&neigh->lock); |
| neigh->ops->error_report(neigh, skb); |
| write_lock(&neigh->lock); |
| } |
| skb_queue_purge(&neigh->arp_queue); |
| } |
| |
| if (neigh->nud_state & NUD_IN_TIMER) { |
| if (time_before(next, jiffies + HZ/2)) |
| next = jiffies + HZ/2; |
| if (!mod_timer(&neigh->timer, next)) |
| neigh_hold(neigh); |
| } |
| if (neigh->nud_state & (NUD_INCOMPLETE | NUD_PROBE)) { |
| struct sk_buff *skb = skb_peek(&neigh->arp_queue); |
| /* keep skb alive even if arp_queue overflows */ |
| if (skb) |
| skb_get(skb); |
| write_unlock(&neigh->lock); |
| neigh->ops->solicit(neigh, skb); |
| atomic_inc(&neigh->probes); |
| if (skb) |
| kfree_skb(skb); |
| } else { |
| out: |
| write_unlock(&neigh->lock); |
| } |
| |
| #ifdef CONFIG_ARPD |
| if (notify && neigh->parms->app_probes) |
| neigh_app_notify(neigh); |
| #endif |
| neigh_release(neigh); |
| } |
| |
| static int arp_constructor_offload(struct neighbour *neigh) |
| { |
| if (dev2tdev(neigh->dev)) |
| neigh->timer.function = neigh_timer_handler_offload; |
| return orig_arp_constructor(neigh); |
| } |
| |
| /* |
| * This must match exactly the signature of neigh_update for jprobes to work. |
| * It runs from a trap handler with interrupts off so don't disable BH. |
| */ |
| static int neigh_update_offload(struct neighbour *neigh, const u8 *lladdr, |
| u8 new, u32 flags) |
| { |
| write_lock(&neigh->lock); |
| cxgb_neigh_update(neigh); |
| write_unlock(&neigh->lock); |
| jprobe_return(); |
| /* NOTREACHED */ |
| return 0; |
| } |
| |
| static struct jprobe neigh_update_jprobe = { |
| .entry = (kprobe_opcode_t *) neigh_update_offload, |
| .kp.addr = (kprobe_opcode_t *) neigh_update |
| }; |
| |
| static int prepare_arp_with_t3core(void) |
| { |
| int err; |
| |
| err = register_jprobe(&neigh_update_jprobe); |
| if (err) { |
| printk(KERN_ERR "Could not install neigh_update jprobe, " |
| "error %d\n", err); |
| return err; |
| } |
| |
| orig_arp_constructor = arp_tbl.constructor; |
| arp_tbl.constructor = arp_constructor_offload; |
| |
| return 0; |
| } |
| |
| static void restore_arp_sans_t3core(void) |
| { |
| arp_tbl.constructor = orig_arp_constructor; |
| unregister_jprobe(&neigh_update_jprobe); |
| } |
| |
| #else /* Module suport */ |
| |
| static inline int prepare_arp_with_t3core(void) |
| { |
| return 0; |
| } |
| |
| static inline void restore_arp_sans_t3core(void) |
| {} |
| #endif |
| |
| #if defined(NETEVENT) |
| static struct notifier_block nb = { |
| .notifier_call = nb_callback |
| }; |
| #endif |
| |
| /* |
| * Process a received packet with an unknown/unexpected CPL opcode. |
| */ |
| static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name, |
| *skb->data); |
| return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; |
| } |
| |
| /* |
| * Handlers for each CPL opcode |
| */ |
| static cpl_handler_func cpl_handlers[NUM_CPL_CMDS]; |
| |
| /* |
| * Add a new handler to the CPL dispatch table. A NULL handler may be supplied |
| * to unregister an existing handler. |
| */ |
| void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h) |
| { |
| if (opcode < NUM_CPL_CMDS) |
| cpl_handlers[opcode] = h ? h : do_bad_cpl; |
| else |
| printk(KERN_ERR "T3C: handler registration for " |
| "opcode %x failed\n", opcode); |
| } |
| EXPORT_SYMBOL(t3_register_cpl_handler); |
| |
| /* |
| * T3CDEV's receive method. |
| */ |
| int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n) |
| { |
| while (n--) { |
| struct sk_buff *skb = *skbs++; |
| unsigned int opcode = G_OPCODE(ntohl(skb->csum)); |
| int ret = cpl_handlers[opcode] (dev, skb); |
| |
| #if VALIDATE_TID |
| if (ret & CPL_RET_UNKNOWN_TID) { |
| union opcode_tid *p = cplhdr(skb); |
| |
| printk(KERN_ERR "%s: CPL message (opcode %u) had " |
| "unknown TID %u\n", dev->name, opcode, |
| G_TID(ntohl(p->opcode_tid))); |
| } |
| #endif |
| if (ret & CPL_RET_BUF_DONE) |
| kfree_skb(skb); |
| } |
| return 0; |
| } |
| |
| /* |
| * Sends an sk_buff to a T3C driver after dealing with any active network taps. |
| */ |
| int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| int r; |
| |
| local_bh_disable(); |
| #if defined(CONFIG_CHELSIO_T3) |
| if (unlikely(netdev_nit)) { /* deal with active taps */ |
| skb->nh.raw = skb->data; |
| if (!skb->dev) |
| skb->dev = dev->lldev; |
| dev_queue_xmit_nit(skb, skb->dev); |
| } |
| #endif |
| r = dev->send(dev, skb); |
| |
| local_bh_enable(); |
| return r; |
| } |
| EXPORT_SYMBOL(cxgb3_ofld_send); |
| |
| /** |
| * cxgb3_ofld_skb - process n received offload packets |
| * @dev: the offload device |
| * @skb: an array of offload packets |
| * @n: the number of offload packets |
| * |
| * Process an array of ingress offload packets. Each packet is forwarded |
| * to any active network taps and then passed to the offload device's receive |
| * method. We optimize passing packets to the receive method by passing |
| * it the whole array at once except when there are active taps. |
| */ |
| int cxgb3_ofld_recv(struct t3cdev *dev, struct sk_buff **skb, int n) |
| { |
| #if defined(CONFIG_CHELSIO_T3) |
| if (likely(!netdev_nit)) |
| return dev->recv(dev, skb, n); |
| |
| for ( ; n; n--, skb++) { |
| skb[0]->dev = dev->lldev; |
| dev_queue_xmit_nit(skb[0], dev->lldev); |
| skb[0]->dev = NULL; |
| dev->recv(dev, skb, 1); |
| } |
| return 0; |
| #else |
| return dev->recv(dev, skb, n); |
| #endif |
| } |
| |
| #if defined(NETEVENT) || defined(OFLD_USE_KPROBES) |
| void cxgb_neigh_update(struct neighbour *neigh) |
| { |
| struct t3cdev *tdev = dev2tdev(neigh->dev); |
| |
| if (tdev) |
| t3_l2t_update(tdev, neigh); |
| } |
| #endif |
| |
| #if defined(NETEVENT) |
| static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e) |
| { |
| struct sk_buff *skb; |
| struct cpl_set_tcb_field *req; |
| |
| skb = alloc_skb(sizeof(*req), GFP_ATOMIC); |
| if (!skb) { |
| printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__); |
| return; |
| } |
| skb->priority = CPL_PRIORITY_CONTROL; |
| req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); |
| req->reply = V_NO_REPLY(1); |
| req->cpu_idx = 0; |
| req->word = htons(W_TCB_L2T_IX); |
| req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX)); |
| req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx)); |
| tdev->send(tdev, skb); |
| } |
| |
| void cxgb_redirect(struct dst_entry *old, struct dst_entry *new) |
| { |
| struct tid_info *ti; |
| struct t3cdev *old_tdev, *new_tdev; |
| u32 tid; |
| int update_tcb; |
| struct l2t_entry *e; |
| struct t3c_tid_entry *te; |
| |
| old_tdev = dev2tdev(old->neighbour->dev); |
| new_tdev = dev2tdev(new->neighbour->dev); |
| |
| if (!old_tdev) |
| return; |
| if (new_tdev) { |
| printk(KERN_WARNING "%s: Redirect to non-offload" |
| "device ignored.\n", __FUNCTION__); |
| return; |
| } |
| |
| if (old_tdev != new_tdev) { |
| printk(KERN_WARNING "%s: Redirect to different " |
| "offload device ignored.\n", __FUNCTION__); |
| return; |
| } |
| |
| /* Add new L2T entry */ |
| e = t3_l2t_get(new_tdev, new->neighbour, new->neighbour->dev); |
| if (!e) { |
| printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n", |
| __FUNCTION__); |
| return; |
| } |
| |
| /* Walk tid table and notify clients of dst change. */ |
| ti = &(T3C_DATA(new_tdev))->tid_maps; |
| for (tid = 0; tid < ti->ntids; tid++) { |
| te = lookup_tid(ti, tid); |
| BUG_ON(!te); |
| if (te && te->ctx && te->client && te->client->redirect) { |
| update_tcb = te->client->redirect(te->ctx, old, new, |
| e); |
| if (update_tcb) { |
| l2t_hold(L2DATA(new_tdev), e); |
| set_l2t_ix(new_tdev, tid, e); |
| } |
| } |
| } |
| l2t_release(L2DATA(new_tdev), e); |
| } |
| #endif |
| |
| #ifndef LINUX_2_4 |
| /* |
| * An administrator has requested that a set of offload policies be attached |
| * to the interface. This functionality is actually managed by toecore and |
| * the new policy will be hung off this net_device's corresponding toedev but |
| * we don't have access to call toecore code. Thus, we need to have one of |
| * our clients -- which can call toecore code -- proxy the call for us. |
| */ |
| int req_set_offload_policy(struct net_device *dev, |
| const struct ofld_policy_file *opf, |
| size_t len) |
| { |
| struct cxgb3_client *client; |
| int found = 0; |
| int ret = -EINVAL; |
| |
| /* |
| * Make sure we're dealing with a network device with offload |
| * activated ... |
| */ |
| if (!offload_activated(dev2t3cdev(dev))) |
| return ret; |
| |
| mutex_lock(&cxgb3_db_lock); |
| list_for_each_entry(client, &client_list, client_list) { |
| /* |
| * We want to restrict ourself to t3_tom module in order to |
| * request our proxy service since A. it talks to toecore and |
| * B. it's the only module which supports the extended |
| * cxgb3_client data structure and has a set_offload_policy |
| * structure element. |
| */ |
| if (client->name && strcmp(client->name, "tom_cxgb3") == 0 && |
| client->set_offload_policy) { |
| found = 1; |
| ret = client->set_offload_policy(dev, opf, len); |
| break; |
| } |
| } |
| mutex_unlock(&cxgb3_db_lock); |
| if (!found) |
| printk(KERN_ERR "req_set_offload_policy: no proxy found\n"); |
| return ret; |
| } |
| #endif /* !LINUX_2_4 */ |
| |
| /* |
| * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc. |
| * The allocated memory is cleared. |
| */ |
| void *cxgb_alloc_mem(unsigned long size) |
| { |
| void *p = kmalloc(size, GFP_KERNEL); |
| |
| if (!p) |
| p = vmalloc(size); |
| if (p) |
| memset(p, 0, size); |
| return p; |
| } |
| |
| /* |
| * Free memory allocated through cxgb3_alloc_mem(). |
| */ |
| void cxgb_free_mem(void *addr) |
| { |
| unsigned long p = (unsigned long) addr; |
| |
| if (p >= VMALLOC_START && p < VMALLOC_END) |
| vfree(addr); |
| else |
| kfree(addr); |
| } |
| |
| static int offload_info_read_proc(char *buf, char **start, off_t offset, |
| int length, int *eof, void *data) |
| { |
| struct t3c_data *d = data; |
| struct tid_info *t = &d->tid_maps; |
| int len; |
| |
| len = sprintf(buf, "TID range: 0..%d, in use: %u\n" |
| "STID range: %d..%d, in use: %u\n" |
| "ATID range: %d..%d, in use: %u\n" |
| "MSS: %u\n", |
| t->ntids - 1, atomic_read(&t->tids_in_use), t->stid_base, |
| t->stid_base + t->nstids - 1, t->stids_in_use, |
| t->atid_base, t->atid_base + t->natids - 1, |
| t->atids_in_use, d->tx_max_chunk); |
| if (len > length) |
| len = length; |
| *eof = 1; |
| return len; |
| } |
| |
| static int offload_info_proc_setup(struct proc_dir_entry *dir, |
| struct t3c_data *d) |
| { |
| struct proc_dir_entry *p; |
| |
| if (!dir) |
| return -EINVAL; |
| |
| p = create_proc_read_entry("info", 0, dir, offload_info_read_proc, d); |
| if (!p) |
| return -ENOMEM; |
| |
| SET_PROC_NODE_OWNER(p, THIS_MODULE); |
| return 0; |
| } |
| |
| static void offload_proc_dev_setup(struct t3cdev *dev) |
| { |
| t3_l2t_proc_setup(dev->proc_dir, L2DATA(dev)); |
| offload_info_proc_setup(dev->proc_dir, T3C_DATA(dev)); |
| } |
| |
| static void offload_info_proc_free(struct proc_dir_entry *dir) |
| { |
| if (dir) |
| remove_proc_entry("info", dir); |
| } |
| |
| static void offload_proc_dev_cleanup(struct t3cdev *dev) |
| { |
| t3_l2t_proc_free(dev->proc_dir); |
| offload_info_proc_free(dev->proc_dir); |
| } |
| |
| /* |
| * Allocate and initialize the TID tables. Returns 0 on success. |
| */ |
| static int init_tid_tabs(struct tid_info *t, unsigned int ntids, |
| unsigned int natids, unsigned int nstids, |
| unsigned int atid_base, unsigned int stid_base) |
| { |
| unsigned long size = ntids * sizeof(*t->tid_tab) + |
| natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab); |
| |
| t->tid_tab = cxgb_alloc_mem(size); |
| if (!t->tid_tab) |
| return -ENOMEM; |
| |
| t->stid_tab = (union listen_entry *)&t->tid_tab[ntids]; |
| t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids]; |
| t->ntids = ntids; |
| t->nstids = nstids; |
| t->stid_base = stid_base; |
| t->sfree = NULL; |
| t->natids = natids; |
| t->atid_base = atid_base; |
| t->afree = NULL; |
| t->stids_in_use = t->atids_in_use = 0; |
| atomic_set(&t->tids_in_use, 0); |
| spin_lock_init(&t->stid_lock); |
| spin_lock_init(&t->atid_lock); |
| |
| /* |
| * Setup the free lists for stid_tab and atid_tab. |
| */ |
| if (nstids) { |
| while (--nstids) |
| t->stid_tab[nstids - 1].next = &t->stid_tab[nstids]; |
| t->sfree = t->stid_tab; |
| } |
| if (natids) { |
| while (--natids) |
| t->atid_tab[natids - 1].next = &t->atid_tab[natids]; |
| t->afree = t->atid_tab; |
| } |
| return 0; |
| } |
| |
| static void free_tid_maps(struct tid_info *t) |
| { |
| cxgb_free_mem(t->tid_tab); |
| } |
| |
| int cxgb3_offload_activate(struct adapter *adapter) |
| { |
| struct t3cdev *dev = &adapter->tdev; |
| int natids, err; |
| struct t3c_data *t; |
| struct tid_range stid_range, tid_range; |
| struct mtutab mtutab; |
| unsigned int l2t_capacity; |
| |
| t = kcalloc(1, sizeof(*t), GFP_KERNEL); |
| if (!t) |
| return -ENOMEM; |
| |
| err = -EOPNOTSUPP; |
| if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 || |
| dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 || |
| dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 || |
| dev->ctl(dev, GET_MTUS, &mtutab) < 0 || |
| dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 || |
| dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0) |
| goto out_free; |
| |
| err = -ENOMEM; |
| L2DATA(dev) = t3_init_l2t(l2t_capacity); |
| if (!L2DATA(dev)) |
| goto out_free; |
| |
| natids = min(tid_range.num / 2, MAX_ATIDS); |
| err = init_tid_tabs(&t->tid_maps, tid_range.num, natids, |
| stid_range.num, ATID_BASE, stid_range.base); |
| if (err) |
| goto out_free_l2t; |
| |
| t->mtus = mtutab.mtus; |
| t->nmtus = mtutab.size; |
| |
| spin_lock_init(&t->tid_release_lock); |
| INIT_LIST_HEAD(&t->list_node); |
| t->dev = dev; |
| |
| T3C_DATA(dev) = t; |
| dev->recv = process_rx; |
| #if defined(NETEVENT) |
| dev->neigh_update = t3_l2t_update; |
| #endif |
| |
| T3_INIT_WORK(&t->tid_release_task, t3_process_tid_release_list, t); |
| |
| offload_proc_dev_setup(dev); |
| |
| /* Register netevent handler once */ |
| if (!atomic_read(®istered_ofld_adapters)) { |
| #if defined(NETEVENT) |
| register_netevent_notifier(&nb); |
| #elif defined(OFLD_USE_KPROBES) |
| if (prepare_arp_with_t3core()) |
| printk(KERN_ERR "Unable to set offload capabilities\n"); |
| #endif |
| } |
| atomic_inc(®istered_ofld_adapters); |
| |
| return 0; |
| |
| out_free_l2t: |
| t3_free_l2t(L2DATA(dev)); |
| L2DATA(dev) = NULL; |
| out_free: |
| kfree(t); |
| return err; |
| } |
| |
| void cxgb3_offload_deactivate(struct adapter *adapter) |
| { |
| struct t3cdev *tdev = &adapter->tdev; |
| struct t3c_data *t = T3C_DATA(tdev); |
| |
| offload_proc_dev_cleanup(tdev); |
| |
| atomic_dec(®istered_ofld_adapters); |
| if (!atomic_read(®istered_ofld_adapters)) { |
| #if defined(NETEVENT) |
| unregister_netevent_notifier(&nb); |
| #else |
| #if defined(OFLD_USE_KPROBES) |
| restore_arp_sans_t3core(); |
| #endif |
| #endif |
| } |
| free_tid_maps(&t->tid_maps); |
| T3C_DATA(tdev) = NULL; |
| t3_free_l2t(L2DATA(tdev)); |
| L2DATA(tdev) = NULL; |
| kfree(t); |
| } |
| |
| static inline void register_tdev(struct t3cdev *tdev) |
| { |
| mutex_lock(&cxgb3_db_lock); |
| list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list); |
| mutex_unlock(&cxgb3_db_lock); |
| } |
| |
| static inline void unregister_tdev(struct t3cdev *tdev) |
| { |
| mutex_lock(&cxgb3_db_lock); |
| list_del(&tdev->ofld_dev_list); |
| mutex_unlock(&cxgb3_db_lock); |
| } |
| |
| static inline int adap2type(struct adapter *adapter) |
| { |
| int type = 0; |
| |
| switch (adapter->params.rev) { |
| case T3_REV_A: |
| type = T3A; |
| break; |
| case T3_REV_B: |
| case T3_REV_B2: |
| type = T3B; |
| break; |
| case T3_REV_C: |
| type = T3C; |
| break; |
| } |
| return type; |
| } |
| |
| void __devinit cxgb3_adapter_ofld(struct adapter *adapter) |
| { |
| struct t3cdev *tdev = &adapter->tdev; |
| |
| INIT_LIST_HEAD(&tdev->ofld_dev_list); |
| |
| cxgb3_set_dummy_ops(tdev); |
| tdev->send = t3_offload_tx; |
| tdev->ctl = cxgb_offload_ctl; |
| tdev->type = adap2type(adapter); |
| |
| register_tdev(tdev); |
| } |
| |
| void __devexit cxgb3_adapter_unofld(struct adapter *adapter) |
| { |
| struct t3cdev *tdev = &adapter->tdev; |
| |
| cxgb3_set_dummy_ops(tdev); |
| |
| unregister_tdev(tdev); |
| } |
| |
| int offload_devices_read_proc(char *buf, char **start, off_t offset, |
| int length, int *eof, void *data) |
| { |
| int i, len = 0; |
| struct t3cdev *tdev; |
| struct net_device *ndev; |
| struct adapter *adapter; |
| |
| len += sprintf(buf, "Device Interfaces\n"); |
| |
| mutex_lock(&cxgb3_db_lock); |
| list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) { |
| len += sprintf(buf + len, "%-16s", tdev->name); |
| adapter = tdev2adap(tdev); |
| for (i = 0; i < adapter->params.nports; i++) { |
| ndev = adapter->port[i]; |
| len += sprintf(buf + len, " %s", ndev->name); |
| } |
| len += sprintf(buf + len, "\n"); |
| if (len >= length) |
| break; |
| } |
| mutex_unlock(&cxgb3_db_lock); |
| |
| if (len > length) |
| len = length; |
| *eof = 1; |
| return len; |
| } |
| |
| void __init cxgb3_offload_init(void) |
| { |
| int i; |
| |
| for (i = 0; i < NUM_CPL_CMDS; ++i) |
| cpl_handlers[i] = do_bad_cpl; |
| |
| t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl); |
| t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl); |
| t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl); |
| t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl); |
| t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl); |
| t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr); |
| t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl); |
| t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss); |
| t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish); |
| t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term); |
| t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_TRACE_PKT, do_trace); |
| t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl); |
| /* for iSCSI */ |
| t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl); |
| t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl); |
| |
| } |
| |
| void __exit cxgb3_offload_exit(void) |
| { |
| //offload_proc_cleanup(); |
| } |